Most airlines measure check-in luggage in linear dimensions, which means the sum of the length, width and height. The most common linear limit for check-in luggage is 62 inches, though it's prudent to confirm.
What if my luggage exceeds 62 inches?
Oversized BagsHere are certain airlines' hold bag restrictions and fees: Delta: $200 per bag within 63”- 80” (161 – 203 cm) American Airlines: $150-200 per bag within 62” – 126” (158 – 320 cm) United: $200-400 per bag within 62” – 115” (158 – 292 cm)